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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Net revenues: | $ 1,354.5 | $ 1,318.7 | $ 3,972.0 | $ 3,814.9
Percent change in net sales | 2.70% |  | 4.10% |
Gross profit: | $ 873.6 | 840.0 | $ 2,534.2 | 2,406.4
Percent change in gross profit | 4.00% |  | 5.30% |
Operating profit | $ 430.1 | 418.9 | $ 1,230.1 | 1,160.0
Percent change in operating profit | 2.70% |  | 6.00% |
Long-lived assets: | $ 198.5 | 173.1 | $ 198.5 | 173.1
Percent change in long-lived assets | 14.70% |  |  |
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Unallocated corporate general and administrative expenses | $ 44.9 | 41.4 | 130.1 | 128.0
Application Software |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues: | $ 405.4 | 378.3 | $ 1,177.2 | 1,060.4
Percent change in net sales | 7.20% |  | 11.00% |
Gross profit: | $ 275.4 | 255.7 | $ 791.5 | 712.5
Percent change in gross profit | 7.70% |  | 11.10% |
Operating profit | $ 110.1 | 97.7 | $ 299.9 | 265.6
Percent change in operating profit | 12.70% |  | 12.90% |
Long-lived assets: | $ 85.6 | 76.4 | $ 85.6 | 76.4
Percent change in long-lived assets | 12.00% |  |  |
Network Software & Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues: | $ 391.2 | 341.9 | $ 1,103.7 | 989.7
Percent change in net sales | 14.40% |  | 11.50% |
Gross profit: | $ 271.9 | 236.7 | $ 763.6 | 674.8
Percent change in gross profit | 14.90% |  | 13.20% |
Operating profit | $ 137.5 | 128.1 | $ 392.0 | 349.7
Percent change in operating profit | 7.30% |  | 12.10% |
Long-lived assets: | $ 50.0 | 36.4 | $ 50.0 | 36.4
Percent change in long-lived assets | 37.40% |  |  |
Measurement & Analytical Solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues: | $ 398.3 | 429.6 | $ 1,208.5 | 1,259.4
Percent change in net sales | (7.30%) |  | (4.00%) |
Gross profit: | $ 234.7 | 253.2 | $ 706.1 | 737.1
Percent change in gross profit | (7.30%) |  | (4.20%) |
Operating profit | $ 127.0 | 136.1 | $ 375.4 | 379.8
Percent change in operating profit | (6.70%) |  | (1.20%) |
Long-lived assets: | $ 41.6 | 39.1 | $ 41.6 | 39.1
Percent change in long-lived assets | 6.40% |  |  |
Process Technologies |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues: | $ 159.6 | 168.9 | $ 482.6 | 505.4
Percent change in net sales | (5.50%) |  | (4.50%) |
Gross profit: | $ 91.6 | 94.4 | $ 273.0 | 282.0
Percent change in gross profit | (3.00%) |  | (3.20%) |
Operating profit | $ 55.5 | 57.0 | $ 162.8 | 164.9
Percent change in operating profit | (2.60%) |  | (1.30%) |
Long-lived assets: | $ 21.3 | $ 21.2 | $ 21.3 | $ 21.2
Percent change in long-lived assets | 0.50% |  |  |

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